Mixed Modals Exercises PDFSet 4: Negative Modals: Mustn't vs Don't Have To, Needn't & Tricky Contrasts Exercises
20 questions·15 min·Answers included·Explanations included
Preview: Questions
Fill in the blank with the correct option.
1.You ___ enter this area without a safety helmet. It's against the regulations.
a) mustn'tb) don't have toc) needn'td) shouldn't
2.You ___ come to the party if you're busy. It's completely optional.
a) mustn'tb) don't have toc) can'td) shouldn't
3.You'd ___ not be late for the interview. They are very strict about punctuality.
a) ratherb) preferc) betterd) like
4.The doctor said I ___ eat less salt, but it's not critical.
a) mustb) mustn'tc) had betterd) should
5.You ___ bring any food. We've already prepared everything for the picnic.
a) needn'tb) mustn'tc) can'td) shouldn't
... and 15 more questions in the PDF
Preview: Answers
1.mustn't
2.don't have to
3.better
4.should
5.needn't
... and 15 more answers in the PDF
Preview: Explanations
1."mustn't"(a)
Use 'mustn't' for strict prohibition. Entering without a safety helmet is forbidden by regulations. 'Shouldn't' would be a recommendation, and 'don't have to' means it's not required (the opposite meaning).
2."don't have to"(b)
Use 'don't have to' when there is no obligation — it's your choice. The word 'optional' confirms that attendance is not required. 'Mustn't' would mean coming to the party is forbidden.
3."better"(c)
Use 'had better not' for strong advice with an implied negative consequence. Being late could cost you the job opportunity. 'Would rather not' expresses a personal preference, not a warning.
4."should"(d)
Use 'should' for moderate advice without urgent consequences. 'It's not critical' tells us this is a gentle recommendation. 'Must' would imply urgent necessity, and 'had better' implies a warning of consequences.
5."needn't"(a)
Use 'needn't' when something is not necessary because it's already taken care of. Food has been prepared, so bringing more is unnecessary. 'Mustn't' would mean bringing food is prohibited.
... and 15 more explanations in the PDF
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